quasar | 544152f92e0a8802c3b9239d713fdcfab852d86635a018a09c3f23a89850fdc8

Analysis

max time kernel
30s
max time network
33s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-12-2024 22:43

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General

Target

Client-built.exe
Size

3.1MB
MD5

0f36e81c4c276b154458f7d2a09f5b10
SHA1

3093c8cf4822174621d6f84f6aa3f5a14de3ca7d
SHA256

544152f92e0a8802c3b9239d713fdcfab852d86635a018a09c3f23a89850fdc8
SHA512

f92dd2e1e90ab79eb7559d5ac5b07172d5a369047d17e505085463aeadb1b32a5a79d810c3e8c8baecc67cf53d2b9c74d2c78ce7ef27f556f3d4b3a04ec4c002
SSDEEP

49152:fvXlL26AaNeWgPhlmVqvMQ7XSKMrARoGddYnTHHB72eh2NT:fvVL26AaNeWgPhlmVqkQ7XSKMrqW

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

football-jumping.gl.at.ply.gg:10230

Mutex

1ebb2be2-2e75-4e5f-a17a-94f1122ac527

Attributes

encryption_key
AD7F465AC5FC4664CDCEA5C89989197BE33BEF08
install_name
talktuah.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/3904-1-0x0000000000500000-0x0000000000824000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b9d-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2188	talktuah.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\talktuah.exe	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir\talktuah.exe	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir\talktuah.exe	talktuah.exe
File opened for modification	C:\Windows\system32\SubDir	talktuah.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3904	Client-built.exe
Token: SeDebugPrivilege	2188	talktuah.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2188	talktuah.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2188	talktuah.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3904 wrote to memory of 2188	3904	Client-built.exe	82
PID 3904 wrote to memory of 2188	3904	Client-built.exe	82

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3904
- C:\Windows\system32\SubDir\talktuah.exe
  "C:\Windows\system32\SubDir\talktuah.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2188

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\System32\SubDir\talktuah.exe

Filesize
3.1MB

MD5
0f36e81c4c276b154458f7d2a09f5b10

SHA1
3093c8cf4822174621d6f84f6aa3f5a14de3ca7d

SHA256
544152f92e0a8802c3b9239d713fdcfab852d86635a018a09c3f23a89850fdc8

SHA512
f92dd2e1e90ab79eb7559d5ac5b07172d5a369047d17e505085463aeadb1b32a5a79d810c3e8c8baecc67cf53d2b9c74d2c78ce7ef27f556f3d4b3a04ec4c002

Download Submit
memory/2188-10-0x00007FFDFA730000-0x00007FFDFB1F1000-memory.dmp

Filesize
10.8MB

Download
memory/2188-11-0x00007FFDFA730000-0x00007FFDFB1F1000-memory.dmp

Filesize
10.8MB

Download
memory/2188-12-0x000000001DBC0000-0x000000001DC10000-memory.dmp

Filesize
320KB

Download
memory/2188-13-0x000000001DCD0000-0x000000001DD82000-memory.dmp

Filesize
712KB

Download
memory/2188-14-0x00007FFDFA730000-0x00007FFDFB1F1000-memory.dmp

Filesize
10.8MB

Download
memory/3904-0-0x00007FFDFA733000-0x00007FFDFA735000-memory.dmp

Filesize
8KB

Download
memory/3904-1-0x0000000000500000-0x0000000000824000-memory.dmp

Filesize
3.1MB

Download
memory/3904-2-0x00007FFDFA730000-0x00007FFDFB1F1000-memory.dmp

Filesize
10.8MB

Download
memory/3904-9-0x00007FFDFA730000-0x00007FFDFB1F1000-memory.dmp

Filesize
10.8MB

Download